forgot to change a line of code to match function name

Author: Nishikiyama

src/main/java/net/sacredlabyrinth/phaed/simpleclans/hooks/discord/DiscordHook.java

@@ -419,7 +419,7 @@ public void createChannel(@NotNull String clanTag)
 
 		} finally {
 			// unlock channel creation for this clantag, perchance.
-			channelsBeingCreated.remove(clanTag);
+			channelIsBeingCreated.remove(clanTag);
 		}
 	}